xpath return all non-blank text nodes not descendant of `a`, `style` or `script`

Question

What expression would select all text nodes which are:

• not blank
• not inside a, or script o

Answer 1

I used Dimitre Novatchev's answer, but then i stumbled upon the problem described by the topic starter:

not descendant of a, style or script

Dimitre's answer excludes style tag but includes its children. This version excludes also style, script, noscript tags and their descendants:

//div[@id='???']//*[not(ancestor-or-self::script or ancestor-or-self::noscript or ancestor-or-self::style)]/text()

Anyway, thanks to Dimitre Novatchev.